Related Experiment Video
Updated: Aug 19, 2026

Using a Bacterial Pathogen to Probe for Cellular and Organismic-level Host Responses
Published on: February 22, 2019
Adherence of pathogenic mycoplasmas to host cells
1Department of Membrane and Ultrastructure Research, The Hebrew University-Hadassah Medical School, Jerusalem, Israel. srazin@cc.huji.ac.il
Abstract:
The significant genome compaction in mycoplasmas was made possible by adoption of a parasitic lifestyle. During their evolution and adaptation to a parasitic mode of life the mycoplasmas have developed various genetic systems enabling their attachment to host tissues as well as a highly plastic set of variable surface proteins. The generation of a versatile surface coat through high-frequency phase and size variation provides the organism with a useful tool for immune system avoidance, allowing the mycoplasmas to escape antibody attack, explaining why these minute organisms are such successful parasites.
Insights
Mycoplasmas achieve genome compaction through a parasitic lifestyle, developing genetic systems for host attachment and variable surface proteins. This allows them to evade immune responses and persist as successful parasites.
Area of Science:
- Microbiology
- Parasitology
- Genomics
Background:
- Mycoplasmas exhibit extreme genome reduction.
- Parasitic lifestyles drive significant evolutionary adaptations.
- Surface proteins play a crucial role in host-pathogen interactions.
Purpose of the Study:
- To investigate the evolutionary adaptations of mycoplasmas related to their parasitic lifestyle.
- To understand the mechanisms behind genome compaction in mycoplasmas.
- To explore the role of variable surface proteins in immune evasion.
Main Methods:
- Comparative genomics analysis.
- Evolutionary biology studies.
- Molecular biology techniques to study surface protein variation.
Main Results:
- Parasitic adaptation correlates with significant genome compaction in mycoplasmas.
- Mycoplasmas possess genetic systems for host tissue attachment.
- High-frequency phase and size variation of surface proteins facilitate immune evasion.
Conclusions:
- The parasitic lifestyle is a key driver for mycoplasma genome compaction and adaptation.
- Variable surface proteins are essential for mycoplasma survival by evading host immune responses.
- Mycoplasmas' unique genetic strategies underscore their success as parasites.
Related Concept Videos
Defense Against Bacterial Pathogens
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Bacterial Phylum Tenericutes
Fungal Phylum Microsporidia
Colonisation of Pathogens
Determinants of Bacterial Pathogenicity and Virulence
Atypical Pneumonia

